Revised Total Coliform Rule (RTCR) violations in Maryland
361 active public water systems in Maryland had a Revised Total Coliform Rule (RTCR) violation in the past three years, 3 of them still unresolved. What Revised Total Coliform Rule (RTCR) is and why it matters.
Systems with a Revised Total Coliform Rule (RTCR) violation
Unresolved first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Campus Hills Water Works Harford County |
250 | 1 | 0 | |
|
Tranquility at Fredericktowne Frederick County |
105 | 4 | 1 | |
|
Wrights Market Wicomico County |
82 | 1 | 1 | |
|
City of Westminster Carroll County |
35,256 | 1 | 0 | |
|
Town of Emmitsburg Frederick County |
2,921 | 1 | 0 | |
|
McDonalds Harford County |
1,230 | 1 | 0 | |
|
Mollys Kent County |
915 | 1 | 0 | |
|
Riva Trace Baptist Church Anne Arundel County |
815 | 1 | 0 | |
|
St. John the Evangelist Catholic School Baltimore County |
730 | 4 | 0 | |
|
Harford Community College Harford County |
713 | 2 | 0 | |
|
Town of Queenstown Queen Anne's County |
705 | 4 | 0 | |
|
Rodney Scout Camp Cecil County |
700 | 1 | 0 | |
|
ST Michaels Catholic Church Howard County |
697 | 2 | 1 | |
|
Bayshore Campground Kent County |
636 | 1 | 0 | |
|
Shore Stop #219 Worcester County |
609 | 1 | 0 | |
|
Highs #1 Whiteford Harford County |
605 | 1 | 0 | |
|
Dash in Food Store Charles County |
550 | 1 | 0 | |
|
Shady Side Elementary Anne Arundel County |
517 | 2 | 1 | |
|
Bryantown Mall Charles County |
512 | 2 | 0 | |
|
St. Marks Church Multipurpose Harford County |
503 | 1 | 0 | |
|
Washington CO Agric Center Washington County |
503 | 1 | 0 | |
|
Capitol Raceway, Double DS Dogs Anne Arundel County |
500 | 1 | 0 | |
|
Downs Memorial Park Well # 2 Anne Arundel County |
500 | 1 | 0 | |
|
Winterplace Market Wicomico County |
500 | 1 | 0 | |
|
YMCA Camp Tockwogh Kent County |
500 | 1 | 0 | |
|
Huntingtown Professional Center, LLC Calvert County |
470 | 2 | 0 | |
|
Southern Calvert Baptist Church Calvert County |
450 | 1 | 0 | |
|
Sunnybrook Baltimore County |
416 | 1 | 0 | |
|
Tolchester Marina Inc. Kent County |
395 | 1 | 0 | |
|
Maryvale Preparatory School Baltimore County |
380 | 1 | 0 | |
|
Plim Plaza Hotel Distribution Worcester County |
380 | 1 | 0 | |
|
Greenbrier Elementary School Washington County |
370 | 1 | 0 | |
|
ST Ignatius Church and ST Thomas Manor Charles County |
353 | 1 | 0 | |
|
St. Stephen School Baltimore County |
350 | 3 | 0 | |
|
Tri-State Christian Academy Cecil County |
350 | 3 | 0 | |
|
Deale Elementary Anne Arundel County |
345 | 1 | 0 | |
|
Chesapeake Landing Restaurant Talbot County |
320 | 1 | 0 | |
|
Kfc Odenton Anne Arundel County |
320 | 2 | 0 | |
|
Lankford Bay Marina Store Kent County |
320 | 2 | 0 | |
|
Hillendale Country Club Baltimore County |
315 | 1 | 0 | |
|
Our Lady of the Chesapeake Anne Arundel County |
308 | 1 | 0 | |
|
Benedictine School Caroline County |
300 | 3 | 0 | |
|
Cedar Mobile Home Park Caroline County |
300 | 3 | 0 | |
|
Dash in Glymont Charles County |
300 | 1 | 0 | |
|
Dollar General #14009 Cecil County |
300 | 2 | 0 | |
|
Elks Lodge 2474 Kent County |
300 | 2 | 0 | |
|
Fast Fuels Gas Station Prince George's County |
300 | 1 | 0 | |
|
Grace Assembly of God Harford County |
300 | 1 | 0 | |
|
Queen Annes County Parks & Recreation Queen Anne's County |
300 | 1 | 0 | |
|
Dollar General Cobb Island Charles County |
294 | 1 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Revised Total Coliform Rule (RTCR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Revised Total Coliform Rule (RTCR) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Maryland records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.